package linthost

import "testing"

// TestFunctionalNoThisExpressionsRejectsThis verifies functional/no-this-expressions rejects this.
//
// `this` binds behavior to ambient object state. The rule reports the keyword
// directly so class and object-method cases share one AST path.
//
// 1. Parse a this expression.
// 2. Enable only functional/no-this-expressions.
// 3. Assert the expression reports and offers no autofix.
//
// @evidence contracts/testing.md#behavioral-verification runFunctionalRule executes the actual engine and verifies this.value reports; assertFunctionalFinding requires exactly one finding carrying this rule identity, no autofix and a message containing the expected fragment, which separates the policy report from duplicate or unrelated findings.
// @evidence contracts/testing.md#independent-expectations The policy rejects ambient object receiver state, not explicit inputs. The authored source states the policy case independently of rule output.
// @evidence contracts/testing.md#distinguishing-cases Positive: `this.value;` must yield exactly one functional/no-this-expressions finding (assertFunctionalFinding). Negative control run through the same rule via assertNoFunctionalFinding: `const result = value;` must yield zero findings; a plain identifier read is accepted. No option-configured variant is exercised here.
// @evidence contracts/testing.md#execution-ownership TestFunctionalNoThisExpressionsRejectsThis is a named Go unit entry running actual TypeScript AST policy operations in the shared engine process; no consumer install, native build or real product host is used.
func TestFunctionalNoThisExpressionsRejectsThis(t *testing.T) {
  const ruleName = "functional/no-this-expressions"
  findings := runFunctionalRule(t, ruleName, `this.value;`)
  assertFunctionalFinding(t, ruleName, findings, "this")
  assertNoFunctionalFinding(t, ruleName, runFunctionalRule(t, ruleName, "const result = value;"))
}